Hi! I just bundled up a package containing the wireshark file, the resulting tif and a screen capture of the scanning process including the scan interface, wiresharks window and video of a webcam which shows the behaviour of the scanner in sync with the rest. I think it might be easier to work out the meaning of the data stream in conjunction with the video.
https://www.dropbox.com/s/oyfmmxcbi6qz55s/vistascan_package_140626.zip What we can see: • at frame 100 the scan is initiated in the imaging software • at frame 135 the driver checks for the scanner • at frame 220 the twain scan interface is open, the scanner starts its spindle • at frame 413 the scanner opens its access door • at frame 473 the access door recognises the plate and closes, pinching the plate • at frame 500 the image plate is inserted (with quite some force, since it’s pinched in by the door) • at frame 524 the scanner recognises the plate, starts pulling it in and switches on the erasing light (the plates can be reused, after being erased by photons) • at frame 690 the fist usable data is coming in (look at the Twain GUI) • at frame 1003 scanning stops, but the scanner has to pull the whole plate through it’s mechanism. Plates can have different sizes… • at frame 1363 the plate drops out of the scanner • at frame 1403 the light is turned off and the access door opens up again • at frame 1559 the twain GUI is closed. the access door gets shut and the spindle gets turned off you can see the inner workings of the scanner here: http://www.duerrdental.com/en/products/imaging/vistascan-image-plate-scanner/vistascan-mini-plus/?changeLang=1 If there are any questions left… Jörg On 25 Jun 2014, at 20:58, M. Allan Noah <[email protected]> wrote: > The simplest, uncompressed bitmap. > > allan > > Sent from my iPhone > > On Jun 25, 2014, at 2:17 PM, Jörg Knochen <[email protected]> wrote: > >> Great! >> >> So now I have to look into wireshark. As far as I can see, it writes a lot >> of different file formats. Which one would be preferable? >> >> Thanks, >> Jörg >> >> >> On 25 Jun 2014, at 14:32, m. allan noah <[email protected]> wrote: >> >>> This looks like a fun project! The complexity of a driver is often >>> inversely proportional to the cost of the scanner. Since this is not a >>> commodity machine, I'm not sure that rule applies. Take a wireshark >>> dump of the smallest scan possible, and put it up on the web >>> somewhere. >>> >>> allan >>> >>> On Wed, Jun 25, 2014 at 3:56 AM, Jörg Knochen <[email protected]> wrote: >>>> Hi! >>>> >>>> I’m the administrator of a small dentists office. The IT is Macintosh >>>> based, with a FreeNAS Server, with one exeption: the workstation used for >>>> XRay operation has to run windows because of ONE missing twain driver for >>>> OS X. >>>> >>>> The scanner is the following model: >>>> >>>> http://www.duerrdental.com/en/products/imaging/vistascan-image-plate-scanner/vistascan-mini-plus/?changeLang=1 >>>> >>>> It can be attached by USB, but in our case it uses a network connection >>>> over IP. >>>> >>>> If i could sniff this network connection and record the communication >>>> between the twain driver and the scanner - is there anyone out there >>>> willing to help me write a sane driver? The manufacturer has no interest >>>> so far in supporting anything but windows. >>>> >>>> Another Idea: wouldn’t it be possible to install the original Twain driver >>>> into a wine bottle and write a sane driver which can pass through the >>>> twain commands from the bottle to a native interface on the unix side? >>>> This would be a GREAT workaround, too. >>>> >>>> Thanks for your time, >>>> Jörg-Ch. Knochen >>>> >>>> >>>> >>>> >>>> >>>> -- >>>> sane-devel mailing list: [email protected] >>>> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel >>>> Unsubscribe: Send mail with subject "unsubscribe your_password" >>>> to [email protected] >>> >>> >>> >>> -- >>> "The truth is an offense, but not a sin" >> -- sane-devel mailing list: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
